61243703566 has 64 divisors (see below), whose sum is σ = 100677427200. Its totient is φ = 27831937536.

The previous prime is 61243703533. The next prime is 61243703567. The reversal of 61243703566 is 66530734216.

It is a super-2 number, since 2×61243703566² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61243703567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35338836 + ... + 35340568.

It is an arithmetic number, because the mean of its divisors is an integer number (1573084800).

Almost surely, 2^61243703566 is an apocalyptic number.

61243703566 is a deficient number, since it is larger than the sum of its proper divisors (39433723634).

61243703566 is a wasteful number, since it uses less digits than its factorization.

61243703566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113.

The product of its (nonzero) digits is 544320, while the sum is 43.

The spelling of 61243703566 in words is "sixty-one billion, two hundred forty-three million, seven hundred three thousand, five hundred sixty-six".